code review 5533057: pkg: add missing godoc comments to windows versions

src/pkg/os/exec/lp_windows.go

 // Copyright 2010 The Go Authors.  All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
 package exec
 
 import (
         "errors"
         "os"
         "strings"
@@ skipping 62 matching lines @@
         }
         if pathenv := os.Getenv(`PATH`); pathenv != `` {
                 for _, dir := range strings.Split(pathenv, `;`) {
                         if f, err = findExecutable(dir+`\`+file, exts); err == nil {
                                 return
                         }
                 }
         }
         return ``, &Error{file, ErrNotFound}
 }